Can a sinus infection spread throughout the body?

A sinus infection, or sinusitis, typically remains localized within the sinus cavities and does not spread throughout the body. However, in rare cases, if the infection is severe or untreated, it can lead to complications such as meningitis or orbital cellulitis, which can affect surrounding structures and potentially spread. It's essential to seek medical attention if symptoms worsen or do not improve. Overall, while the risk is low, serious complications can arise from a sinus infection.